AD 2004-07-01 Airworthiness Directives; Bombardier Model CL-600-2C10 (Regional Jet Series 700 & 701), and CL-600-2D24 (Regional Jet Series 900) Series Airplanes

Model CL-600-2C10 (Regional Jet Series 700 & 701) and CL-600-2D24 (Regional Jet Series 900) series airplanes, as listed in CRJ 700/900 Regional Jet (Bombardier) Alert Service Bulletin 670BA-28-025, Revision A, dated December 15, 2003; certificated in any category.

Required as indicated, unless accomplished previously. To detect and correct cracking in the primary fuel ejector, which could cause fuel leakage into the center fuel tank, and result in engine shutdown during flight, accomplish the following: Airplane Flight Manual (AFM) Revisions (a) Within 14 days after the effective date of this AD: Revise the Abnormal Procedures sections of the Bombardier Model CL-600-2C10 and Model CL-600-2D24 Airplane Flight Manuals (AFM), Documents CSP B-012 and CSP C-012, to include the applicable Temporary Revisions (TR) specified in paragraphs (a)(1) and (a)(2) of this AD. Thereafter, operate the airplane per the limitations specified in these AFM revisions. (1) CRJ Regional Jet (Bombardier) TR RJ 700/52-2, dated December 19, 2003, to the Bombardier Model CL-600-2C10 AFM, Document CSP B-012. (2) CRJ (Bombardier) TR RJ 900/10-1, dated December 19, 2003, to the Bombardier Model CL-600-2D24 AFM, Document CSP C-012. Note 1: When information identical to that in the applicable TR specified in paragraphs (a)(1) and (a)(2) of this AD has been included in the general revisions of the applicable AFM, the general revisions may be inserted into the AFM, and the TR may be removed from the AFM. Prior Requirement (b) For airplanes having serial numbers (S/N) 10005 through 10065, inclusive; prior to accomplishing the leak test required by paragraph (c) of this AD, install flexible hoses and brackets in the fuel feed system in accordance with the Accomplishment Instructions of Bombardier CRJ 700 Regional Jet Service Bulletin, 670BA-28-008, Revision C, dated January 23, 2003. Leak Tests (c) At the applicable compliance time, for the applicable S/N in Table 1 of this AD, do a leak test between the wing tanks and the center fuel tank in accordance with the Accomplishment Instructions of CRJ 700/900 Regional Jet (Bombardier) Alert Service Bulletin 670BA-28-025, Revision A, dated December 15, 2003. Thereafter, repeat the leak test at intervals not to exceed 450 flight hours. Table 1.—Leak Test Thresholds Airplane S/N Accumulated flight hours Inspection threshold 10005 through 10065, inclusive More than 2,500 flight hours since accomplishment of the service bulletin in paragraph (b) of this AD Within 100 flight hours after the effective date of this AD. 10005 through 10065, inclusive 2,500 flight hours or less since accomplishment of the service bulletin in paragraph (b) of this AD Within 250 flight hours after the effective date of this AD. 10003 and 10004; 10066 through 10999, inclusive; and 15001 through 15990, inclusive 2,500 flight hours or more since the date of issuance of the original Airworthiness Certificate or the date of issuance of the Export Certificate of Airworthiness, whichever occurs first Within 100 flight hours after the effective date of this AD. 10003 and 10004; 10066 through 10999, inclusive; and 15001 through 15990, inclusive 2,499 flight hours or less since the date of issuance of the original Airworthiness Certificate or the date of issuance of the Export Certificate of Airworthiness, whichever occurs first Within 450 flight hours after the effective date of this AD. Detailed Inspection and Repair (d) If, during the leak test required by paragraph (c) of this AD, the amount of fuel increase in the center fuel tank is 150 pounds (68 Kgs) or more: Before further flight, do the further investigative and corrective actions, in accordance with the Accomplishment Instructions of CRJ 700/900 Regional Jet (Bombardier) Alert Service Bulletin 670BA-28-025, Revision A, dated December 15, 2003. Note 2: For the purposes of this AD, a detailed inspection is defined as: “An intensive visual examination of a specific structural area, system, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at intensity deemed appropriate by the inspector. Inspection aids such as mirror, magnifying lenses, etc., may be used. Surface cleaning and elaborate access procedures may be required.” Actions Accomplished per Previous Releases of Service Bulletin 670BA-28-008 (e) Actions accomplished before the effective date of this AD in accordance with Bombardier CRJ 700 Regional Jet Service Bulletin 670BA-28-008, Revision A, dated September 16, 2002; or Revision B, dated October 2, 2002; are considered acceptable for compliance with the corresponding action in this AD. Reporting and Part Return Requirements (f) Although the Accomplishment Instructions of CRJ 700/900 Regional Jet (Bombardier) Alert Service Bulletin 670BA-28-025, Revision A, dated December 15, 2003, specify to submit certain information to the manufacturer, and to return damaged parts to the manufacturer; this AD does not include such requirements. Alternative Methods of Compliance (g) In accordance with 14 CFR 39.19, the Manager, New York Aircraft Certification Office, FAA, is authorized to approve alternative methods of compliance for this AD. Incorporation by Reference (h) Unless otherwise specified in this AD, the actions shall be done in accordance with CRJ Regional Jet (Bombardier) Temporary Revision RJ 700/52-2 dated, December 19, 2003, to the Bombardier CL-600-2C10 Airplane Flight Manual, Document CSP B-012; CRJ Regional Jet (Bombardier) Temporary Revision RJ 900/10-1, dated December 19, 2003, to the Bombardier CL-600-2D24 Airplane Flight Manual, Document CSP C-012; CRJ 700/900 Regional Jet (Bombardier) Alert Service Bulletin 670BA-28-025, Revision A, excluding Appendix A, dated December 15, 2003; and Bombardier CRJ 700 Regional Jet Service Bulletin 670BA-28-008, Revision C, dated January 23, 2003; as applicable. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from Bombardier, Inc., Canadair, Aerospace Group, P.O. Box 6087, Station Centre-ville, Montreal, Quebec H3C 3G9, Canada. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the FAA, New York Aircraft Certification Office, 1600 Stewart Avenue, Westbury, New York; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. Note 3: The subject of this AD is addressed in Canadian airworthiness directive CF-2004-04, dated February 12, 2004. Effective Date (i) This amendment becomes effective on April 15, 2004. Issued in Renton, Washington, on March 19, 2004. Kevin M. Mullin, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 04-6774 Filed 3-30-04; 8:45 am] BILLING CODE 4910-13-P